import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'listpage.dart';
import 'customScrollview.dart';
import 'singlechild.dart';
import 'multychild.dart';
import 'stackchild.dart';
import 'updateitem.dart';
import 'modes/updateItem.dart';
import 'paintchild.dart';
import 'theme.dart';
import 'package:date_format/date_format.dart';
import 'movevent.dart';
import 'value_inheritedwidget.dart';
import 'value_notification.dart';
import 'value_eventbus.dart';
import 'routers.dart';
import 'animate.dart';
import 'method_channel.dart';

void main() {
  Future(() => print('f1'))
      .then((_) async => await Future(() => print('f2')))
      .then((_) => print('f3'));
  Future(() => print('f4'));
  //上一个事件循环结束后，连续输出三段字符串

  runApp(MyApp());
}

Map<String, WidgetBuilder> routers = {
  'second_page': (context) => SecondPageScreen(),
};

class MyApp extends StatelessWidget {
  // This widget is the root of your application.

// iOS浅色主题
  final ThemeData kIOSTheme = ThemeData(
      brightness: Brightness.light, //亮色主题
      accentColor: Colors.white, //(按钮)Widget前景色为白色
      primaryColor: Colors.blue, //主题色为蓝色
      iconTheme: IconThemeData(color: Colors.grey), //icon主题为灰色
      textTheme: TextTheme(body1: TextStyle(color: Colors.black)) //文本主题为黑色
      );
// Android深色主题
  final ThemeData kAndroidTheme = ThemeData(
      brightness: Brightness.dark, //深色主题
      accentColor: Colors.black, //(按钮)Widget前景色为黑色
      primaryColor: Colors.purple, //主题色Wie青色
      iconTheme: IconThemeData(color: Colors.blue), //icon主题色为蓝色
      textTheme: TextTheme(body1: TextStyle(color: Colors.red)) //文本主题色为红色
      );

  @override
  Widget build(BuildContext context) {
    print(formatDate(DateTime.now(), [mm, '月', dd, '日', hh, ':', n]));
    print(formatDate(DateTime.now(), [m, '月第', w, '周']));

    return MaterialApp(
      title: 'Flutter Demo',
      theme: defaultTargetPlatform == TargetPlatform.iOS
          ? kIOSTheme
          : kAndroidTheme,
      home: ChanelDemoPage(),
      routes: routers,
    );
  }
}

class DemoHomePage extends StatelessWidget {
  final UpdateItemModel demoitem = UpdateItemModel(
      appIcon: "assets/icon.png",
      appDescription:
          "Thanks for using Google Maps! This release brings bug fixes that improve our product to help you discover new places and navigate to them.",
      appName: "Google Maps - Transit & Fond",
      appSize: "137.2",
      appVersion: "Version 5.19",
      appDate: "2019年6月5日");

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
          // Here we take the value from the MyHomePage object that was created by
          // the App.build method, and use it to set our appbar title.
          title: Text("DemoPage"),
        ),
        body:
            AnimationPageView() // This trailing comma makes auto-formatting nicer for build methods.
        );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);

  // This widget is the home page of your application. It is stateful, meaning
  // that it has a State object (defined below) that contains fields that affect
  // how it looks.

  // This class is the configuration for the state. It holds the values (in this
  // case the title) provided by the parent (in this case the App widget) and
  // used by the build method of the State. Fields in a Widget subclass are
  // always marked "final".

  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;

  void _incrementCounter() {
    setState(() {
      // This call to setState tells the Flutter framework that something has
      // changed in this State, which causes it to rerun the build method below
      // so that the display can reflect the updated values. If we changed
      // _counter without calling setState(), then the build method would not be
      // called again, and so nothing would appear to happen.
      _counter++;
    });
  }

  @override
  Widget build(BuildContext context) {
    // This method is rerun every time setState is called, for instance as done
    // by the _incrementCounter method above.
    //
    // The Flutter framework has been optimized to make rerunning build methods
    // fast, so that you can just rebuild anything that needs updating rather
    // than having to individually change instances of widgets.
    return Scaffold(
      appBar: AppBar(
        // Here we take the value from the MyHomePage object that was created by
        // the App.build method, and use it to set our appbar title.
        title: Text(widget.title),
      ),
      body: Center(
        // Center is a layout widget. It takes a single child and positions it
        // in the middle of the parent.
        child: Column(
          // Column is also a layout widget. It takes a list of children and
          // arranges them vertically. By default, it sizes itself to fit its
          // children horizontally, and tries to be as tall as its parent.
          //
          // Invoke "debug painting" (press "p" in the console, choose the
          // "Toggle Debug Paint" action from the Flutter Inspector in Android
          // Studio, or the "Toggle Debug Paint" command in Visual Studio Code)
          // to see the wireframe for each widget.
          //
          // Column has various properties to control how it sizes itself and
          // how it positions its children. Here we use mainAxisAlignment to
          // center the children vertically; the main axis here is the vertical
          // axis because Columns are vertical (the cross axis would be
          // horizontal).
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Text(
              'You have pushed the button this many times:',
            ),
            Text(
              '$_counter',
              style: Theme.of(context).textTheme.headline4,
            ),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _incrementCounter,
        tooltip: 'Increment',
        child: Icon(Icons.add),
      ), // This trailing comma makes auto-formatting nicer for build methods.
    );
  }
}
